Finding the Fourth Proportional to 3,180.72, 4,770.45 and 1,072.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,180.72 : 4,770.45 = 1,072.11 : x
2. Step 2: Convert to fraction form
   3,180.72/4,770.45 = 1,072.11/x
3. Step 3: Cross multiply
   3,180.72x = 4,770.45 × 1,072.11
4. Step 4: Simplify right side
   3,180.72x = 5,114,447.15
5. Step 5: Solve for x
   x = 5,114,447.15/3,180.72
6. Step 6: Final answer
   x = 1,607.95